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[4] Ayaz Ullah, Jong-Suk Ahn, and Gayoung Kim. “X-MAC Protocol with Collision Avoidance Algorithm”, Ubiquitous and Future Networks (ICUFN), 2013 Fifth International Conference on Year: 2013 Pages: 228 - 233, IEEE Conference Publications.

[5] Ayaz Ullah, Gayoung Kim, and Jong-Suk Ahn. “Performance Analysis of X-MAC protocol with Collision Avoidance Algorithm”, 2013 IEEE INFOCOM Student Poster Session.
[6] G. Lu, B. Krishnamachari, and C. S. Raghavendra. “An  adaptive energy-efficient and low-latency MAC for data  gathering sensor networks”, 4th International Workshop on  Algorithms  for  Wireless,  Mobile,  Ad  Hoc  and Sensor Networks, 2004.
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